Brake-shoe.



BRAKE SHOE. unmulou mn' JULY 24, 1912.

. Patented July 28 2 SHEETSSHEBT 1.

Eh PFTTIS. BRAKE SHOE. AE'FMGPJIOH FILED mum, 1am.

Patented m 28, 1914,

v I BBHBBTB-BHFETz. I

10 all whom it may concern:

UNITED PATENT OFFICE.

CLIFTON n. rE'r'rIs, or cmcaoo, ILL'INoIS BRAKE-SHOE.

Specification of Letters latent. 4 Patented July 28, 1914. Application filed July 24; 1912. Serial No. -711',3M

Be it known that I, CLIFTON D. Pn'rris, a

I citizen of the United States, and a resident of the city of Chicago, county of Cook, and

1 State of Illinois, have invented certain new and useful Improvements in Brake- Shoes, of which I do declare the following to'be a full, clear, and exact descriptiom'reference being had to the accompanying drawings,.forming part of this specification.

1 My upresent invention has relation more partlc arly to that class of brake shoes for railway cars in which the back portion of the shoe isstrengthened by a plate or rods of soft steel or li e ductile metal preferably embedded in the body of the cast iron of the slide in the casting operation. Examples of this type of shoe 'are illustrated in Letters Patent No. 892,883, granted to me July 7, 1908.-

It is a fact well recognized by those familiar with the manufacture and use of brake shoes for railway cars, that the weakest parts of brake shoes are apt to be the lugs by which the shoes are engaged by the rake heads, or points-immediately adjacent thereto. For this reason, various attempts have heretofore been made to reinforce or strengthen the lugs of brake shoes and to provide lmproved means for connecting such ln s to the ductile metal backs of the shoe.

roadly stated,-- the object of the present invention is to provide an exceedingly strong rigid, durable and edective construction oi brake shoe lug and one which may be most effectively and securely fastened to the steel back or' reinforcing rods 01 the ,ishoe.

AOI

tion of center lug whereby the brakeshoe is connected at its center by a key to the A further and specific object of. this invention is to provide an improved construcbrake head. In an application filed by me of even date herewith, Serial No. 711,305, I haveshown the broad features of the present invention as applied to the production of an improved construction of end lug for the brake shoe; and such end lug is specifically claimed in said companion application;

My present invention ,consists in tlie features of novelty hereinafter described, illustrated in the accompanying drawings and particularly pointed out in the claims at the end of this specification.

Figure 1- is a view in side elevation a the brake shoe.

' brake shoe embodying my invention. Fig. 2

is a lan view. Fig. 3 is a detail view of the blan from'which my improved center lug willbe formed. Fig. 4: is a detail plan view of the central portionflof the reinforcing back plate for, the shoe. Fig. 5 is a view in cross section on line'5- 5 of Fig. 2. Fig. 6 1s aview' in cross section on line 6-6 of .Fig. 5. Fig. 7 is a view in longitudinal secapplied to a brake shoe having reinforcing central attaching lug formed as a mallea le casting. Fig. 10 is a view showing the lug illustrated in Fig. 9 in position for use upon Fig. 11 is a detail plan view of the central portion of the reinforcing lljitck designed to receive the lug shown in tion on 1ine'77 of Fig. 5. .Fig. 8 is a view similar to Fig. 5, but showing the invention rods. -Fi'g. 9 .is a detail view showin a Y. My present invention will be found susceptible of application to a variety of reinforced brake shoes, to several of which it is shown as a plied in the accompanying drawings. T e body portion 20 of the brake shoe may be formed of cast metal, in the usual manner. g Referring to Figs. 1 to 7 of the drawings, 21 designates the strengthening back platev of the shoe, that will be embedded in the body of the shoe durin the casting operathe back plate 21 is formed at eachside 0 its longitudinal center withtwo openings-23. and 24', through which will ass respectively the locking members 25 and 26 that project downwardly from the side portions of the Fach of the lockingmembe'rs 25 is formed adjacent itsfree en with an opening.25- and each of these locking members 25 is formed integral with the corresponding side wall 27 of the attaching lug, the side walls.

27 being integral with'the crowu 28 of the lug. The side portions' of the attaching lugs are U-shaped, or of channel form in cross section (see Fig. 6), this being accomplished by forming each of the side walls 27 of the lug with laterally'projecting brace walls or extensions 30. Integral with extensions 30 are formed the base portions 3l of the'lug which, when brought together, as shown in. Fig. 7, ofthe drawings, completely fill the space between the walls or extensions 30, and the locking members 26 are formed integral with the'base portions 31. WVhen the attaching-lug is in position for use upon the back plate 21, the locking members 25 will be bent outwardly, as shown in Fig. 5 of the drawings, and the locking members 26 extend through openings 25 of the locking members 25 and will have their free ends bent in opposite directions, as clearly shown in Fig. '7 of the drawings.

When my improved locking lug is to be formed from plate metalfthe blanks, cut to the shape shown in Fig. 3, will be bent. so

. that the side Walls 27 shall extend at ap- .portions 3 1 will be bent proximately right angles to the crown 28 of the lug. The brace walls or extensions 30 will be bent at approximately right angles to the sidewalls 27 of the lug and the base to, approximately horizontal position, so as to fill the spaces between the brace walls or extensions 30, (see Fig. 7). Thelocking members 26 will be brought together and turned down to a position approximately at right angles to the base portions 31. The locking members 25 and 26 will hen be passed through the openings 23 and 24 of the back plate after which the locking members 25 will be bent outwardly so that the locking members 26 will extend through the holes 25 of the loc 'ng members 25 and then the free ends of the locking members 26 will be bent in opposite direction, as shown in Fig. 7 and firmly forced against the under side of the locking members 25. By dotted lines in Fig. 3 of the drawings, I have indicated approximately the lines on which he blank there shown will be bent to form t e completed at taching lug. Preferably, t e locking members 25 after they have been bent outwardly, as shown in Fig. 5 of thel drawings, will have their free ends bent downwardly so that the cast metal, ofwhich the body20 of the shoe is formed, will flow around the free ends of the locking members 25 and thus effectively guard against any possibility of the disengagement of the loc 'ng members. If desired, after the center lug has been attached to the back plate and the locking members 25 and 26 have been interlocked, as shown in 5, the parts may be electrically welded, oi. familiar methods suitable for such purpose.

By reference it) Fig. 7 of the drawings, it will be observed that each of the side p01- tions of my improved lug are tapering in wall of metal (as by the base portions 31) between the brace walls or extensions 30, these walls 30 are materially strengthened and the metal between these walls 30 also serves to effectively brace the side walls 27 of the lug. Again, by forming the attaching lug with locking members which extend through the reinforcing plate of the brake shoe and interlock with each other at two points at each side of the longitudinal cenweight of the shoe ter of the shoe, much greater rigidity of attachment between the lug and the reinforcing back plate is secured than would be possible with a single locking member. So, also, by providing the attaching lug with locking members which pass through the reinforcing back plate and interlock with I side of such plate, all danger of the attaching lug becoming looseor disengaged from the back plate is etfectivcl y prevented. I believe that not only does my improved attaching lug afford a much stronger, more durable and more effective means for attaching the brake shoe to the brake head than with prior constructions, but inasmuch as the attaching lug requires no cast metal reinforcement, the is materially lessened. Other features of advantage incident tomy invention, or parts thereof, will readily otherwise welded by any of the occur to those familiar with this class of devices.

In Fig. 8 of the drawings, I have shown how my invention may be applied to brake shoes of that type in which reinforcing rods 40 extending longitudinally of the emplpyed to strengthen shoe are the shoe-this being one Iamlliar way of reinforcingthe backs of brake shoes. The manner of connecting my improved attaching'lug to the rods 40 will be readily understood from Fig. 8 and need not be more particularly described. It will be understood also that informing a brake shoe embodying my invention the attaching lug will first be connected to the reinforcing back plate or strengthening rods of the shoe, after which these parts will be placed in a mold and the body of cast metal will be cast upon or around the-back plate orrods in manner well understood by those familiar with the manufacture of brake shoes.

In Figs. 9 to 11 of the drawings, I have shown my improved attaching lug as formed of a malleable casting. In this form of the invention, all the parts will be formed integral dndthe crown. 28, the side walls 27, the bra'cewalls 30 and the locking members Edwin-be. of substantially the shape herein beforel described, the locking members having openings 25*adjacent their ends to receive the locking members 26. But in this form of the invention the base portion 31 at each side of the attaching lug will extend between and be cast integral with the corresponding "brace walls and from the underside of each of these central portions 31' a, single locking member 26 is shown as Y ' whereby a channel-she.

I as depending,

members 26 in instead of the two locking v the form of the invention hereinbefore described. When the locking members 25 and 26 have been inserted through the openin s of the back plate 31, in manner hereinbe ore described, the looking members 25 will be bent outwardly, as shown in Fig. 10, so that the locking members'26 will pass through the openings 25 of the locking members 25, after which the free ends of the locking members 26* will be bent laterally, as shown.

It is obvious that the precise details of i the construction above set out may be varied within widexlimits without departing from the spirit of the invention, and thatvfea turesof the invention may be employed with out its adoption as an entirety. Y

' Havin' thus described my invention, what I claim a new, and desire to secure by Letters Patent, is:

1. The combination with a brake shoe, of

a lug formed of an integral piece of ductile metal havin I integral wit laterally therefrom at the edges thereof a crown, side walls, brace walls said s1de walls and extendlng ing members projecting therefrom and arranged to interlock one with the other.

4. Inc brake shoe, the combination with a reinforcing back," 'of a lug provided with a plurality of locking members engaging side walls extending and locking members ute I said reinforcing back and interlocked with each other. V

5. The combination of a brake shoe having a back plate and an attaching lug formed of luctile metal and having a crown and side walls, and locking members outside of said side walls and extending through the back plate of the shoe, locking members being bent to interlock with said back plate.

6. The combination with a brake shoe, of a back plate provided adjacent its center with four openings and an attaching lug.

formed of an integral ductile metal plate,

portions, a crown and between the crown and locking members integral with said lug having base back plate,

said side walls and extending through said back plate, and locking members integral with said base portions and extending through said back plate.

7. A brake shoe comprlsing a cast metal body, a reinforcing member therein, and a center attaching lug made of ductile metal, said lughaving a crown, side walls at opposite sides of thecrown, brace walls extendmg laterally and integral with each of said side walls, and locking'members connecting the side portions of the lug with said reinforcing member.

- 8. The combination with a brake shoe of.

an attaching lug made of ductile metal and comprising a crown and side walls formed integral with said crown, each of said side walls having brace walls extending laterally from and integral therewith and atsubstantially right angles to said side walls.

9. The combination with; a brakeshoe of an attaching lug formed of ductile metal and having side portions provided each with a plurality of locking members for at.- taching the lug to the shoe.

10. The combination with a brake shoe of the free ends of said an attaching lug formed of ductile metal nd having a crown and side walls and base portions integral with the crown, and lock ing members extending from said.base portrons. v g

l1. Thercombinationwith a brake shoe of an attaching lug formed of ductile metal and havmg sideportions each provided with ya plurality. of locking members, on e of said membersbemg cut away to receive the other of said members.

.12. The combinatmn with a brake shoe of anattaching lug formed of ductile metal 'i'an'd having side portions each provided with two depending locking members,

locking members having a hole adjacent its end adapted to receive the other of said lockingmembers.

13. The combination with a brake shoe of anattaching lug formed of ductile metal and having side portions each formed of a side wall, laterally projecting bra/w walls one of said 7 integral with said side walls, base portions of which is formed with a plurality of de inte ral with said brace Walls and dependpending locking members enia ing said re-- 10 ing locking members certain ofwhich are inforcing back, and interloc e with each integral with said side walls and others of other.

which are integral with said brace wells. 5 CLIFTON D. PETTI'S.

14. In a. brake shoe, the combination with Witnesses:

a cast metal body and a reinforcing back, of GEO. P. FIsHER,

an attaching 111; having side portions each KATHARINE GERLAGH. 

